Interchangeable blade guides provide optimum sharpening angles. Blade guides automatically hold knife at the perfect sharpening angle. Kindly refer the user manual given below for troubleshooting steps.The item "Professional Electric Knife Commercial Blade Sharpener Kitchen Home Knives NEW" is in sale since Sunday, February 19, 2017. This item is in the category "Home & Garden\Kitchen, Dining & Bar\Kitchen Tools & Gadgets\Sharpeners". The seller is "aronkorn" and is located in Spring Valley, New York. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, Honduras, Antigua and barbuda, Aruba, Dominica, Grenada, Saint lucia, Barbados, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Gibraltar, Guadeloupe, Iceland, Jordan, Cayman islands, Sri lanka, Luxembourg, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Viet nam, Uruguay, Russian federation, El salvador, Jamaica.